Specimen

SASSA experimental

(specimen 6, at 860˚C for 200 min

FSS annealed

experimental

(specimen 13, annealed )

SDSSA experimental

(specimen 16, heated at 860˚C for 40 s)

SDSSA

calculated

Microstructure

×400 equiaxed grains,

Secondary precipitates

Grain size differs

×400 equiaxed grains,

No secondary precipitates

Grain size differs

×400 Arrayed grains

Secondary precipitates

Grain size differs

Phases

Grains: g-phase, Precipitates: s-phase, Carbides, nitrides

Grains: a-phase, equiaxed

Grains: g-phase,a-phase

Precipitates:s-phase, Carbides, nitrides in g grains

Toughness

(impact)

=17 J

=21 J

=22 J

=0.5 × (17 + 21)

= 19 J

with 14 % deviation

CWL

=Zero mg/cm²

11.7252 mg/cm²

0.1051 mg/cm²

=0.5 × (0 + 11.7252)

= 5.8626 mg/cm²

with almost 100 % deviation